Anticreep warp-lifting roller in circular weaving looms



March 13, 1951 J, RABEUX T A 2,544,766

ANTICREEP WARP-LIFTING ROLLER IN CIRCULAR WEAVING LOOMS Filed Jan. 26, 1949 2 Sheets-Sheet 1 In Yer? furs Jean F1 abeqX Ra mend Jacob Manila, 1951 R B X ET A 2,544,766

ANTICREEP WARP-LIFTING ROLLER IN CIRCULAR WEAVING LOOMS In vehfars Jaw /%bM Y fi p wa/ydjacob Patented Mar. 13, 1951 ANTICREEP WARP-LIFTING ROLLER IN CIRCULAR WEAVING LOOMS Jean Rabeux and Raymond Jacob, Flixecourt,

France, assignors to Societe Saint Freres (Societe Anonyme) Paris, France Application January 26, 1949, Serial No. 72,792 In France January 28, 1948 6 Claims. 1

The present invention concerns circular weaving looms and aims more particularly at checking the tendency of the fabric to creep circumferentially in the direction of rotation of the shuttles.

The present invention consists in a roller provided at the rear of each shuttle, rotated about the loom well at a speed equal to that of the shuttle and of which the rim which is made of a thread-retaining material will slightly lift the warp thread sheets as it moves past the same and rotated at a peripheral speed higher than its speed of revolution about the well, with the result that each warp thread will be replaced on the well edge without any vibration at a point just a little behind the one it occupied when lifted therefrom by the roller.

The action of the roller according to the invention offsets the lateral displacement to which the warp threads are subjected in the direction of rotation of the shuttles due to the friction exerted thereupon by the latter and to the pull consequent to the insertion of the weft-thread. In view of the action exerted upon the warp threads by the roller according to the invention said roller is called a warp-lifting roller.

The advantage with the roller according to the invention is that the wrap threads that are caught by the periphery thereof are shifted backwards (considering the direction of rotation of the shuttles) to a point behind the one occupied by each particular thread before it was crossed by the roller without any vibration being imparted to said thread; effectively, the undesired effect of such vibrations would be to immediately cancel the lifting action of the roller and to restore the warp threads to the positions occupied by the same on the edge of the well prior to the passage of the roller according to the invention. A further effect of such vibrations would be to curl the warp threads.

According to a further feature of the invention, where the shuttle motion comprises a driving roller, the rotational movement of the lifting roller according to the invention is derived from that of said driving roller. More particularly, the driving roller and thelifting roller may be keyed on one and the same shaft. Such anarrangement considerably facilitates the mounting of the lifting roller which in this manner is rotated about the well at the same speed as the driving roller and consequently as the shuttle while it is rotated about their common shaft at the same speed as the driving roller; the ratio between the diameters of either roller may be so chosen 2 that the peripheral speed imparted to the lifting roller will tend to shift the warp threads contrawise to the direction of displacement of the said roller about the well.

The roller according to the invention may be used in combination with weft-thread combining the beating and warp-thread distributing devices.

More particularly, the lifting roller may be located at the rear of a wheel provided at its periphery with spikes designed to press the weft thread into the shed.

According to a particular feature of the invention the lifting action exerted upon the warp threads by the roller according to the invention is combined with a scraping of the warp threads effected by the shuttle, of which the weft thread inserting arm is provided with suitable spikes or scrapers.

A particular embodiment of the invention will be described hereinafter, reference being had to the appended drawing which relates to a circular weaving loom in which the shuttle is propelled by a driving roller and in which the lifting roller and the driving roller are keyed on one and the same shaft.

Figure 1 is a radial section on line II in Fig. 3.

Figure 2 is a vertical section of the lifting roller taken on line II-II in Fig. 1.

Figure 3 is a plan View.

Figure 4 is a plan view showing a warp thread scraping device.

Figures 5, 6 and 7 illustrate various embodiments of the spikes or scrapers for the combing or scraping of the warp threads.

Figure 8 is a plan view of aweaving loom equipped according to the invention.

The lifting roller I is keyed on one and the same shaft 2 as the driving roller 3 by which the shuttle 4 is propelled.

The shaft 2 is driven through the medium of a gear train 5, a shaft 6 and a pinion 1 which meshes with a fixed spur ring 8. As the housing 9 in which the rollers l and 3, the gear train 5, the shaft 6 and the pinion 1 are mounted is revolved about the well ll) of the loom with respect to the fixed spur ring 8, the pinion I is rotated and its movement is transmitted to the shaft 2 and to the rollers l and 3.

I'he rim I l of the roller l is made of rubber.

The topmost portion of the roller l lifts the sheets of warp threads !2 close to the well I 0.

The peripheral speed of the roller l is slightly higher than the speed at which the same is revolved about the well, with the result that the warp threads that are lifted by the roller I are laid down again upon the edge l3 of the well II) at points thereon which (considering the direction in which the shuttles are run) lie behind those at which they were standing before they were lifted by the roller. The aforedescribed action of theroller counteracts the a tendency of the fabric H to :creepground, i.:-e. the tendency of the warp threads to become wound in helices on the inside of the well It, as they would other-- wise due to their being shifted laterally every time the shuttles move acrossanddue also-*tothe slight pull exerted by the weft thread-in'the direction of movement of the shuttles.

The arrow Fin Fig. 2 shows'tthe-direction ofthe peripheral speed of the roller I while the arrowzf denotes the direction of rotationtofthe shuttles, i'. e. the direction in which the roller I is revolved about the well ill.

The weft thread laying arm I! provided'on the shuttle carries spikes :Lfi which are effective to scrape the warp threads to.:sor,t them rout land 'to uniformize the distance between aeach :of them and the next one.

Figures 5, 6 and '7 illustrate :various embodiments of the spikes or scrapers :18.

Consequently the scraping of the .warpithrea'ds eifected by the spikes or :scrapers 18 is combined with the lifting action -0f the roller 4.

The spikes or scrapers l8 'scrape the threads 12 and sort them out while the roller lifts the threads resting on the edge 43 of the well in the order of succession in which they stand jus't*be-- fore the passage of the said roller.

What we claim is:

1. In .a circular weaving loom having a well and comprising at least one shuttle by means of which a weft thread is "laid between the ways thread sheets close to the top of the -well, -a warp-lifting roller positioned at 'the rear of each shuttle and revolved about the jloom well at a speed equal to that of the shuttle the rim of said roller being formed from a thread-retaining material and being adapted to slightly lift the warp threads as it moves past the same, said roller .be-

4 ing rotated at a peripheral speed greater than the speed of revolution of the roller about the well whereby each warp thread will be replaced on the well edge without vibration at a point just a little behind the one it occupied when lifted therefrom by 'the roller.

2. In :acircular weaving loom according to claim 1, wherein the warp-lifting roller is rubberrimmed.

o.3.,In a .circular weaving loom according to claim 1, va propelling roller for each shuttle and means for simultaneously driving each warplifting roller and the related propelling roller.

-;4."In a circular weaving loom according to claim 1, in which each shuttle is provided with 1apropellingroller'mounted upon a shaft, and a tokeep them equally'spaced without any 'change in their 'order of succession while they are lifted clear of the top'edge-of the well, the said scraping means comprising a weft-laying arm rigid with the shuttle-and having-ajplurality of spikes provided thereon.

JEAN 'RABEUX. RAYMOND JACOB.

REFERENCES CITED The following references are of record in the .file of this patent:

UNITED STATES PATENTS Number Name Date 503,544 De Laski Aug. '15,, 1893 2,238,658 Pelee et al. Apr. 15, 1941 2,398,956 Pelce Apr. 23, 1946 

